Diffusion of free trions in mixed-type GaAs/AlAs quantum wells

Howard W. Yoon; M. D. Sturge; Arza Ron; L. N. Pfeiffer

doi:10.1016/S0022-2313(97)00056-2

Diffusion of free trions in mixed-type GaAs/AlAs quantum wells

Howard W. Yoon, M. D. Sturge, Arza Ron, L. N. Pfeiffer

Research output: Contribution to journal › Article › peer-review

1 Scopus citations

Abstract

We show that an emission line which depends on the simultaneous presence of excitons and < 2 × 10¹⁰ cm^-2 electrons in a 20 nm GaAs quantum well is due to free negatively charged excitons or 'trions'. Using time- and spatially-resolved photoluminescence, we find that trions and excitons are localized at 5 K, and with increasing bath temperature both species become mobile. The diffusivity of trions and excitons increases linearly with bath temperature, and the trion mobility is found to be about one-half the exciton mobility.

Original language	English (US)
Pages (from-to)	302-304
Number of pages	3
Journal	Journal of Luminescence
Volume	72-74
DOIs	https://doi.org/10.1016/S0022-2313(97)00056-2
State	Published - Jun 1997
Externally published	Yes

All Science Journal Classification (ASJC) codes

Biophysics
Atomic and Molecular Physics, and Optics
General Chemistry
Biochemistry
Condensed Matter Physics

Keywords

Diffusion
Quantum wells
Trions

Access to Document

10.1016/S0022-2313(97)00056-2

Cite this

@article{e20fa06237314f52914cfa2458743638,

title = "Diffusion of free trions in mixed-type GaAs/AlAs quantum wells",

abstract = "We show that an emission line which depends on the simultaneous presence of excitons and < 2 × 1010 cm-2 electrons in a 20 nm GaAs quantum well is due to free negatively charged excitons or 'trions'. Using time- and spatially-resolved photoluminescence, we find that trions and excitons are localized at 5 K, and with increasing bath temperature both species become mobile. The diffusivity of trions and excitons increases linearly with bath temperature, and the trion mobility is found to be about one-half the exciton mobility.",

keywords = "Diffusion, Quantum wells, Trions",

author = "Yoon, {Howard W.} and Sturge, {M. D.} and Arza Ron and Pfeiffer, {L. N.}",

year = "1997",

month = jun,

doi = "10.1016/S0022-2313(97)00056-2",

language = "English (US)",

volume = "72-74",

pages = "302--304",

journal = "Journal of Luminescence",

issn = "0022-2313",

publisher = "Elsevier",

}

TY - JOUR

T1 - Diffusion of free trions in mixed-type GaAs/AlAs quantum wells

AU - Yoon, Howard W.

AU - Sturge, M. D.

AU - Ron, Arza

AU - Pfeiffer, L. N.

PY - 1997/6

Y1 - 1997/6

N2 - We show that an emission line which depends on the simultaneous presence of excitons and < 2 × 1010 cm-2 electrons in a 20 nm GaAs quantum well is due to free negatively charged excitons or 'trions'. Using time- and spatially-resolved photoluminescence, we find that trions and excitons are localized at 5 K, and with increasing bath temperature both species become mobile. The diffusivity of trions and excitons increases linearly with bath temperature, and the trion mobility is found to be about one-half the exciton mobility.

AB - We show that an emission line which depends on the simultaneous presence of excitons and < 2 × 1010 cm-2 electrons in a 20 nm GaAs quantum well is due to free negatively charged excitons or 'trions'. Using time- and spatially-resolved photoluminescence, we find that trions and excitons are localized at 5 K, and with increasing bath temperature both species become mobile. The diffusivity of trions and excitons increases linearly with bath temperature, and the trion mobility is found to be about one-half the exciton mobility.

KW - Diffusion

KW - Quantum wells

KW - Trions

UR - http://www.scopus.com/inward/record.url?scp=0031168413&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0031168413&partnerID=8YFLogxK

U2 - 10.1016/S0022-2313(97)00056-2

DO - 10.1016/S0022-2313(97)00056-2

M3 - Article

AN - SCOPUS:0031168413

SN - 0022-2313

VL - 72-74

SP - 302

EP - 304

JO - Journal of Luminescence

JF - Journal of Luminescence

ER -

Diffusion of free trions in mixed-type GaAs/AlAs quantum wells

Abstract

All Science Journal Classification (ASJC) codes

Keywords

Access to Document

Other files and links

Fingerprint

Cite this